To clarify the indication of plankton fatty acids (FAs) under the influence of the natural environmental factors that affect FA composition and transmission, the Hongfeng Reservoir was investigated including plankton community structure and FA composition as well as the physical and chemical indicators of water quality. Thereafter, redundancy analysis (RDA) was performed to analysis the pattern of plankton FA composition during August 2018 to July 2019. The results showed that water quality indicators, including total phosphorus (TP), total nitrogen (TN), chlorophyll a (Chl a), pH, and DO, exerted significant influence on plankton FA composition. It was also observed that Cyanophyta (Pseudanabaena limnetica, Merismopedia and Cylindrospermopsis raciborskii) and copepod (Mongolodiaptomus birulai) constituted the dominant phytoplankton and zooplankton communities, respectively. Further, Saturated fatty acids (SFAs) presented a relatively intuitive indication of the changes in the community structure of Cyanophyta. One of the MUFAs (C16:1) content reflected Bacillariophyta community structure changes. Additionally, there is a good indicational effect between C18:2ω6 and cladocerans, which exhibit a feeding phenomenon toward Cryptophyta. Rotifers obtained C20:2 through Pyrrophyta in order to get polyunsaturated fatty acids (PUFAs). EPA is indication of rotifers. The research results can provide theoretical support for understanding the mechanism of fatty acid transfer among plankton.

为明确浮游生物脂肪酸（FAs）在影响FA组成和传递的自然环境因素影响下的指示，研究了红峰水库浮游生物群落结构和FA组成以及水质的理化指标。此后，通过冗余分析（RDA）分析了2018年8月至2019年7月浮游生物FA组成格局。结果表明，水质指标包括总磷（TP）、总氮（TN）、叶绿素a（Chl a )、pH 和 DO 对浮游生物 FA 组成有显着影响。还观察到蓝藻门 ( Pseudanabaena limnetica、 Merismopedia和Cylindrospermopsis raciborskii）和桡足类（Mongolodiaptomus birulai）分别构成了主要的浮游植物和浮游动物群落。此外，饱和脂肪酸（SFA）相对直观地表明了蓝藻群落结构的变化。其中一项 MUFA (C16:1) 内容反映了芽孢杆菌群落结构的变化。此外，C18:2ω6与枝角类之间有良好的指示作用，表现出对隐藻的摄食现象。轮虫通过 Pyrrophyta 获得 C20:2 以获得多不饱和脂肪酸 (PUFA)。EPA 是轮虫的指征。研究结果可为了解浮游生物间脂肪酸转移机制提供理论支持。